<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <meta http-equiv="X-UA-Compatible" content="ie=edge">
  <title>Document</title>
</head>
<body>
  <script>
    const a = 'cat', b = 'dog';
    const finalStr = `${a} says miao~, ${b} says wang~`;
    console.log(finalStr)
    </script>
</body>
</html>